CN220210634U - Signal conversion circuit, PCB and decoding device thereof - Google Patents
Signal conversion circuit, PCB and decoding device thereof Download PDFInfo
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- CN220210634U CN220210634U CN202223051728.6U CN202223051728U CN220210634U CN 220210634 U CN220210634 U CN 220210634U CN 202223051728 U CN202223051728 U CN 202223051728U CN 220210634 U CN220210634 U CN 220210634U
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- 238000011161 development Methods 0.000 abstract description 4
- 238000012986 modification Methods 0.000 description 4
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- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
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- 238000005286 illumination Methods 0.000 description 1
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Abstract
The utility model discloses a signal conversion circuit, a PCB and a decoding device thereof, wherein the signal conversion circuit comprises a main control unit, a signal conversion unit and a connection unit, the main control unit is electrically connected with the signal conversion unit, and the connection unit is respectively electrically connected with the main control unit and the signal conversion unit; the main control unit is used for receiving and transmitting serial port signals of the lamp; the signal conversion unit is used for converting CAN bus signals and serial port signals of the main control unit; the connecting units are used for connecting the lamp and the CAN bus; the signal conversion circuit is independently arranged, so that communication connection with the CAN bus CAN be realized for different lamps, when the lamp is used, bus control of the lamps CAN be realized by only connecting the circuit between the lamps and the CAN bus, the universality is strong, the development difficulty of the lamps is reduced through the arrangement, a serial port transceiver circuit is not required to be considered when the lamps are designed, and a plug port is reserved on the lamp control circuit.
Description
Technical Field
The utility model relates to the technical field of lamp control, in particular to a signal conversion circuit, a PCB and a decoding device thereof.
Background
The existing outdoor or indoor brightening illumination lamp generally adopts a CAN bus protocol to carry out communication control, and a control circuit of the lamp cannot directly complete communication with a CAN bus, so that the serial port transceiver circuit needs to be added into the control circuit of the lamp in the early stage of lamp design, the whole development difficulty is increased, and part of traditional lamps are not considered to be added with the serial port transceiver circuit in the early stage of design, so that the part of lamps are difficult to realize CAN bus control.
It can be seen that there is a need for improvements and improvements in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present utility model is to provide a signal conversion circuit, which CAN convert control signals of a CAN bus protocol to realize communication connection between a CAN bus and a lamp, and is compatible with a conventional lamp, so that the conventional lamp CAN also realize CAN bus control.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the signal conversion circuit comprises a main control unit, a signal conversion unit and a connection unit, wherein the main control unit is electrically connected with the signal conversion unit, and the connection unit is respectively electrically connected with the main control unit and the signal conversion unit; the main control unit is used for receiving and transmitting serial port signals of the lamp; the signal conversion unit is used for converting CAN bus signals and serial port signals of the main control unit; the connecting units are used for connecting the lamp and the CAN bus.
In the signal conversion circuit, the main control unit comprises a first control chip U1, the signal conversion unit comprises a second control chip U2, a pin 34 of the first control chip U1 is connected with a pin 1 of the second control chip U2, a pin 32 of the first control chip U1 is connected with a pin 4 of the second control chip U2, a pin 3, a pin 4, a pin 12, a pin 13 and a pin 14 of the first control chip U1 are respectively connected with the connection unit, and pins 6-8 of the second control chip U2 are respectively connected with the connection unit; the pin 6 and the pin 7 of the second control chip U2 are used for receiving and transmitting differential voltage signals of the CAN bus.
In the signal conversion circuit, the connection unit comprises a first pin arranging part J1 and a second pin arranging part J2; the pin 1 of the first pin arranging part J1 is connected with the pin 6 of the second control chip U2, the pin 2 of the first pin arranging part J1 is connected with the pin 7 of the second control chip U2, the pin 3 of the first pin arranging part J1 is connected with the pin 8 of the second control chip U2, the pin 5 of the first pin arranging part J1 is connected with the pin 3 of the first control chip U1, and the pin 6 of the first pin arranging part J1 is connected with the pin 4 of the first control chip U1; the pins 4 of the second pin arranging part J2 are connected with the pins 14 of the first control chip U1, the pins 5 of the second pin arranging part J2 are connected with the pins 13 of the first control chip U1, and the pins 6 of the second pin arranging part J2 are connected with the pins 12 of the first control chip U1.
In the signal conversion circuit, a second resistor R2 is connected in series between the pin 6 of the second control chip U2 and the pin 1 of the first pin arranging part J1, and the second resistor R2 is used for collecting differential voltage of the CAN bus.
In the signal conversion circuit, the main control unit further comprises a crystal oscillator part Y1, wherein a pin 2 and a pin 4 of the crystal oscillator part Y1 are grounded, the pin 1 of the crystal oscillator part Y1 is connected with a pin 6 of the first control chip U1, and a pin 3 of the crystal oscillator part Y1 is connected with a pin 5 of the first control chip U1; the crystal oscillator part Y1 is used for providing a clock signal for the first control chip U1.
In the signal conversion circuit, the signal conversion unit includes an eighth capacitor C8 and a ninth capacitor C9, one ends of the eighth capacitor C8 and the ninth capacitor C9 are respectively connected with the pin 3 of the second control chip U2, the other ends of the eighth capacitor C8 and the ninth capacitor C9 are grounded, and the pin 3 of the second control chip U2 is connected with an external power supply.
In the signal conversion circuit, the main control unit further comprises a second resistor R2 and a light emitting diode LED1, one end of the second resistor R2 is connected with the pin 46 of the first control chip U1, the other end of the second resistor R2 is connected with the cathode of the light emitting diode LED1, and the anode of the light emitting diode LED1 is connected with an external power supply.
In the signal conversion circuit, the second control chip U2 is an interface chip with a model of SIT 1050.
The application also provides a PCB board, which is printed with the signal conversion circuit.
The application also provides a decoding device which adopts the signal conversion circuit to control the operation.
The beneficial effects are that:
the utility model provides a signal conversion circuit, which CAN realize communication connection between different lamps and a CAN bus by independently arranging the signal conversion circuit, and CAN realize bus control of the lamps by only connecting the circuit between the lamps and the CAN bus when in use, and the signal conversion circuit has strong universality.
Drawings
Fig. 1 is a circuit configuration diagram of a signal conversion circuit provided by the present utility model.
Fig. 2 is a circuit block diagram of a signal conversion circuit provided by the present utility model.
Description of main reference numerals: the device comprises a 1-main control unit, a 2-signal conversion unit, a 3-connection unit, a 4-CAN bus and a 5-lamp.
Detailed Description
The utility model provides a signal conversion circuit, a PCB and a decoding device thereof, which are used for making the purposes, the technical scheme and the effects of the utility model clearer and more definite, and the utility model is further described in detail below by referring to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
Referring to fig. 1 to 2, the present utility model provides a signal conversion circuit, which includes a main control unit 1, a signal conversion unit 2 and a connection unit 3, wherein the main control unit 1 is electrically connected with the signal conversion unit 2, and the connection unit 3 is electrically connected with the main control unit 1 and the signal conversion unit 2 respectively; the main control unit 1 is used for receiving and transmitting serial port signals of the lamp 5; the signal conversion unit 2 is used for converting a CAN bus 4 signal and a serial port signal of the main control unit 1; the connection units 3 are used for connecting the lamp 5 and the CAN bus 4.
The working principle of the application is as follows: the user sets the circuit between the lamp 5 and the CAN bus 4, and realizes the quick connection between the circuit and the lamp 5 and the CAN bus 4 through the connection unit 3; when a user sends a differential signal to the CAN bus 4 through an external control terminal, the differential voltage acquired by the signal conversion unit 2, namely the differential signal, is converted into a serial signal, the serial signal is sent to the main control unit 1, and the main control unit 1 controls the lamp 5 according to the serial signal; when the lamp 5 feeds back working information to a user, the lamp 5 sends parameter information of the working state of the lamp to the main control unit 1, the main control unit 1 sends the parameter information to the signal conversion unit 2 for data conversion, and the signal conversion unit 2 converts the parameter information into a differential signal and feeds back the differential signal to a control terminal of the user through the CAN bus 4; the communication connection with the CAN bus 4 CAN be realized by arranging the signal conversion circuit independently for different lamps 5, and when the lamp is used, the bus control of the lamps 5 CAN be realized by only connecting the circuit between the lamps 5 and the CAN bus 4, so that the universality is strong, the development difficulty of the lamps 5 is reduced by the arrangement, a serial port receiving and transmitting circuit is not required to be considered when the lamps 5 are designed, and a plug port is reserved on a lamp 5 control circuit.
The differential signal and the serial signal are specifically input voltage modification signals, output current modification signals and the like; the operating parameters of the luminaire 5 are regulated by the CAN bus 4.
As shown in fig. 1 to 2, further, the main control unit 1 includes a first control chip U1, the signal conversion unit 2 includes a second control chip U2, a pin 34 of the first control chip U1 is connected to a pin 1 of the second control chip U2, a pin 32 of the first control chip U1 is connected to a pin 4 of the second control chip U2, a pin 3, a pin 4, a pin 12, a pin 13 and a pin 14 of the first control chip U1 are respectively connected to the connection unit 3, and pins 6-8 of the second control chip U2 are respectively connected to the connection unit 3; the pins 6 and 7 of the second control chip U2 are used for receiving and transmitting differential voltage signals of the CAN bus 4; when the device is used, the pins 6 and 7 of the second control chip U2 are respectively used for receiving and transmitting low-potential CAN voltage and high-potential CAN voltage, and a control signal for the first control chip U1 is obtained by judging a differential signal between the low-potential CAN voltage and the high-potential CAN voltage, and the second control chip U2 converts the differential signal into a serial signal and then sends the serial signal to the first control chip U1 through the pin 1; in addition, the second control chip U2 receives the serial signal of the first control chip U1 through the pin 4, thereby implementing the data transceiving operation between the first control chip U1 and the CAN bus 4
In this embodiment, the second control chip U2 is an interface chip with a model of SIT1050, and has a capability of performing differential signal transmission between the bus and the CAN protocol controller; in addition, the second control chip U2 has a high-speed mode and a mute mode, the switching between the two modes is realized by adjusting the pin 8 of the second control chip U2, the high-speed mode is a normal operation mode, the pin 8 is grounded to select, and if the pin 8 is not connected, the second control chip U2 is in a default mode; in the mute mode, the second control chip U2 is disabled and CAN be used to prevent network communication congestion due to out of control of the CAN controller.
In this embodiment, the first control chip U1 is a single chip microcomputer chip with a model number of STM32F103C8T 6.
As shown in fig. 1 to 2, further, the connection unit 3 includes a first pin row portion J1 and a second pin row portion J2; the pin 1 of the first pin arranging part J1 is connected with the pin 6 of the second control chip U2, the pin 2 of the first pin arranging part J1 is connected with the pin 7 of the second control chip U2, the pin 3 of the first pin arranging part J1 is connected with the pin 8 of the second control chip U2, the pin 5 of the first pin arranging part J1 is connected with the pin 3 of the first control chip U1, and the pin 6 of the first pin arranging part J1 is connected with the pin 4 of the first control chip U1; the pin 4 of the second pin arranging part J2 is connected with the pin 14 of the first control chip U1, the pin 5 of the second pin arranging part J2 is connected with the pin 13 of the first control chip U1, and the pin 6 of the second pin arranging part J2 is connected with the pin 12 of the first control chip U1; the first pin arranging part J1 and the second pin arranging part J2 are arranged, so that the circuit CAN be conveniently connected with the lamp 5 and the CAN bus 4, and in the installation process, the lamp 5 and the CAN bus 4 CAN be connected with the circuit by only matching the first pin arranging part J1 with the second pin arranging part J2 through a wire arrangement, so that a user CAN conveniently install the circuit outside the lamp 5; in this embodiment, the first pin header J1 and the second pin header J2 are each six-pin headers.
Note that, the unused pins 4 of the first pin header J1 are reserved pins.
As shown in fig. 1 to 2, further, a second resistor R2 is connected in series between the pin 6 of the second control chip U2 and the pin 1 of the first pin arranging part J1, and the second resistor R2 is used for collecting the differential voltage of the CAN bus 4; the differential voltage of the CAN bus 4 is acquired through the second resistor R2, so that the first control chip U1 CAN quickly acquire control signals; in this embodiment, the resistance of the second resistor R2 is 2.2K ohms.
As shown in fig. 1 to 2, further, the main control unit 1 further includes a crystal oscillator portion Y1, where a pin 2 and a pin 4 of the crystal oscillator portion Y1 are grounded, the pin 1 of the crystal oscillator portion Y1 is connected to a pin 6 of the first control chip U1, and the pin 3 of the crystal oscillator portion Y1 is connected to a pin 5 of the first control chip U1; the crystal oscillator part Y1 is used for providing a clock signal for the first control chip U1; the crystal oscillator part Y1 provides a clock signal for the first control chip U1 so that the first control chip U1 can control the lamp 5 in real time; it should be noted that, the crystal oscillator portion Y1 is an existing crystal oscillator chip with a frequency of 8MHz, and a specific working principle thereof is an existing technology, which is not described herein.
As shown in fig. 1 to 2, further, the signal conversion unit 2 includes an eighth capacitor C8 and a ninth capacitor C9, one ends of the eighth capacitor C8 and the ninth capacitor C9 are respectively connected to the pin 3 of the second control chip U2, the other ends of the eighth capacitor C8 and the ninth capacitor C9 are grounded, and the pin 3 of the second control chip U2 is used for being connected to an external power supply; the external power supply is a 3.3V power supply; the second control chip U2 is connected with a 3.3V power supply through a pin 3, so that power supply of the second control chip U2 is realized; in addition, the eight capacitors C8 and the ninth capacitor C9 are arranged to filter the input power supply, so that stability in power supply is improved.
As shown in fig. 1 to 2, further, the main control unit 1 further includes a second resistor R2 and a light emitting diode LED1, one end of the second resistor R2 is connected to the pin 46 of the first control chip U1, the other end of the second resistor R2 is connected to the negative electrode of the light emitting diode LED1, and the positive electrode of the light emitting diode LED1 is connected to an external power supply; indicating the working state of the first control chip U1 through the light emitting diode LED 1; the light emitting diode LED1 may be a single color lamp or a multi-color lamp; when the light emitting diode LED1 is a monochromatic lamp, the first control chip U1 is indicated to work normally when the light emitting diode LED1 is lighted, and the first control chip U1 is indicated to work abnormally when the light emitting diode LED1 is turned off; when the light emitting diode LED1 is a multi-color lamp, the first control chip U1 is indicated to work normally when the light emitting diode LED1 emits green light, the first control chip U1 is indicated to work abnormally when the light emitting diode LED1 emits red light, and the first control chip U1 is indicated to stop working when the light emitting diode LED1 emits off light; when in use, the first control chip U1 sends a control signal to the light emitting diode LED1 through the pin 46, and the output current of the pin 46 is limited through the second resistor R2, so that the overload burning out of the light emitting diode LED1 is avoided.
The application also provides a PCB board printed with the signal conversion circuit; it should be noted that, be provided with on the PCB board with first row needle portion J1 with the female row that the needle portion J2 corresponds is arranged to the second, can be convenient for through setting up female row first row needle portion J1 with the grafting of needle portion J2 is arranged.
The application also provides a decoding device which adopts the signal conversion circuit to control the operation.
In summary, the signal conversion circuit is independently arranged to enable different lamps 5 to be in communication connection with the CAN bus 4, when the circuit is used, bus control of the lamps 5 CAN be achieved only by connecting the circuit between the lamps 5 and the CAN bus 4, universality is high, development difficulty of the lamps 5 is reduced through the arrangement, a serial port transceiver circuit is not required to be considered when the lamps 5 are designed, and a connecting port is reserved on a lamp 5 control circuit.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present utility model and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model as defined in the following claims.
Claims (10)
1. The signal conversion circuit is characterized by comprising a main control unit, a signal conversion unit and a connection unit, wherein the main control unit is electrically connected with the signal conversion unit, and the connection unit is respectively electrically connected with the main control unit and the signal conversion unit; the main control unit is used for receiving and transmitting serial port signals of the lamp; the signal conversion unit is used for converting CAN bus signals and serial port signals of the main control unit; the connecting units are used for connecting the lamp and the CAN bus.
2. The signal conversion circuit according to claim 1, wherein the main control unit comprises a first control chip U1, the signal conversion unit comprises a second control chip U2, a pin 34 of the first control chip U1 is connected with a pin 1 of the second control chip U2, a pin 32 of the first control chip U1 is connected with a pin 4 of the second control chip U2, a pin 3, a pin 4, a pin 12, a pin 13 and a pin 14 of the first control chip U1 are respectively connected with the connection unit, and pins 6-8 of the second control chip U2 are respectively connected with the connection unit; the pin 6 and the pin 7 of the second control chip U2 are used for receiving and transmitting differential voltage signals of the CAN bus.
3. The signal conversion circuit according to claim 2, wherein the connection unit includes a first pin header J1 and a second pin header J2; the pin 1 of the first pin arranging part J1 is connected with the pin 6 of the second control chip U2, the pin 2 of the first pin arranging part J1 is connected with the pin 7 of the second control chip U2, the pin 3 of the first pin arranging part J1 is connected with the pin 8 of the second control chip U2, the pin 5 of the first pin arranging part J1 is connected with the pin 3 of the first control chip U1, and the pin 6 of the first pin arranging part J1 is connected with the pin 4 of the first control chip U1; the pins 4 of the second pin arranging part J2 are connected with the pins 14 of the first control chip U1, the pins 5 of the second pin arranging part J2 are connected with the pins 13 of the first control chip U1, and the pins 6 of the second pin arranging part J2 are connected with the pins 12 of the first control chip U1.
4. The signal conversion circuit according to claim 3, wherein a second resistor R2 is connected in series between the pin 6 of the second control chip U2 and the pin 1 of the first pin header J1, and the second resistor R2 is used for collecting a differential voltage of the CAN bus.
5. The signal conversion circuit according to claim 2, wherein the main control unit further comprises a crystal oscillator portion Y1, a pin 2 and a pin 4 of the crystal oscillator portion Y1 are grounded, the pin 1 of the crystal oscillator portion Y1 is connected to a pin 6 of the first control chip U1, and the pin 3 of the crystal oscillator portion Y1 is connected to a pin 5 of the first control chip U1; the crystal oscillator part Y1 is used for providing a clock signal for the first control chip U1.
6. The signal conversion circuit according to claim 2, wherein the signal conversion unit includes an eighth capacitor C8 and a ninth capacitor C9, one ends of the eighth capacitor C8 and the ninth capacitor C9 are respectively connected to the pin 3 of the second control chip U2, the other ends of the eighth capacitor C8 and the ninth capacitor C9 are grounded, and the pin 3 of the second control chip U2 is used for being connected to an external power source.
7. The signal conversion circuit according to claim 2, wherein the main control unit further comprises a second resistor R2 and a light emitting diode LED1, one end of the second resistor R2 is connected to the pin 46 of the first control chip U1, the other end of the second resistor R2 is connected to the negative electrode of the light emitting diode LED1, and the positive electrode of the light emitting diode LED1 is connected to an external power source.
8. The signal conversion circuit according to claim 2, wherein the second control chip U2 is an interface chip of a model SIT 1050.
9. A PCB board on which the signal conversion circuit according to any one of claims 1 to 8 is printed.
10. A decoding device, characterized in that the decoding device is operative controlled by means of a signal conversion circuit as claimed in any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223051728.6U CN220210634U (en) | 2022-11-16 | 2022-11-16 | Signal conversion circuit, PCB and decoding device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223051728.6U CN220210634U (en) | 2022-11-16 | 2022-11-16 | Signal conversion circuit, PCB and decoding device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220210634U true CN220210634U (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223051728.6U Active CN220210634U (en) | 2022-11-16 | 2022-11-16 | Signal conversion circuit, PCB and decoding device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220210634U (en) |
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2022
- 2022-11-16 CN CN202223051728.6U patent/CN220210634U/en active Active
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